What follows are specific eyepieces that I have tried, own, or have read so many good reports about that I feel very comfortable recommending them. Be aware of the focal ratio of your scope.Įyepieces are standardized, so whatever investment you make today, the eyepieces will continue to serve you in any future scopes you may own.Look at the apparent field of view specs and understand what this means for the field of view.Note that unless you have severe astigmatism, glasses are unnecessary the only effect of severe near- or far-sightedness is a different focus placement than people with good vision, though in more mild cases this effect is negligible. Pay attention to the eye relief, especially if you will be observing with glasses.Know what diameter eyepieces your scope takes.The magnification range that is appropriate for your scope.When selecting the best eyepiece for your telescope, consider: But some people demand the very best, and it is available, at a price. But the difference in price to get to the next level is high, and the performance difference may be small. To get the best performance, you have to be willing to pay the price. Recommendations – The Best Telescope Eyepieces We Know But I think you will feel more confident about your purchases and be less likely to be disappointed if you read through the guide. If you just want the best eyepiece recommendations and don’t care about the details, I’m adding that section right below before we go into the specifications that answer the above questions and make use of the formulas. These are things you will want to know and use. Exit pupil = telescope focal ratio / focal length of eyepieceĭon’t worry about the math, as it’s simple stuff you can do with any calculator, on paper, or perhaps in your head.The maximum practical magnification of a telescope is typically 40-60x per inch of aperture, or 1.6-2.5x per mm.Focal ratio = focal length of telescope / aperture of telescope.True field of view, or FOV = Apparent field of view (AFOV) of the eyepiece / magnification.Magnification or power = focal length of telescope / focal length of eyepiece.How will my telescope’s focal ratio affect my purchases?.What apparent field of view and eye relief do I want?.What focal length eyepieces should I buy?.What diameter eyepieces will my telescope accept?.So, I am going to organize the guide around five questions and four formulas.Īs we go along, I will refer back to these, so don’t worry if you can’t answer the questions or understand the formulas now. I want to help you select the best eyepieces for your telescope and your budget. Most telescopes come with one or two eyepieces, which gives you one or two magnification options. However, if you want to optimize your viewing experience, you’ll need to invest in a better-quality eyepiece. By having a range of magnifications, you can optimize the image, which means you need more eyepieces.
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